共 50 条
- [32] SMOOTHNESS OF THE SOLUTIONS OF SOME CLASSES OF NONLINEAR PARTIAL-DIFFERENTIAL EQUATIONS DOKLADI NA BOLGARSKATA AKADEMIYA NA NAUKITE, 1986, 39 (07): : 25 - 27
- [33] DETERMINED AND NORMAL SYSTEMS OF PARTIAL-DIFFERENTIAL EQUATIONS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1981, 293 (04): : 257 - 260
- [36] ON WHITEHEAD GROUP AND SYSTEMS OF PARTIAL-DIFFERENTIAL EQUATIONS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1984, 299 (07): : 205 - 208
- [37] ON LOCALLY INVERTIBLE SYSTEMS OF PARTIAL-DIFFERENTIAL EQUATIONS COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE I-MATHEMATIQUE, 1984, 299 (17): : 863 - 866
- [39] FORMAL INTEGRABILITY OF SYSTEMS OF PARTIAL-DIFFERENTIAL EQUATIONS LECTURE NOTES IN PHYSICS, 1985, 226 : 21 - 36
- [40] SOLUTIONS EXTENSION FOR PARTIAL-DIFFERENTIAL EQUATIONS SYSTEMS VESTNIK MOSKOVSKOGO UNIVERSITETA SERIYA 1 MATEMATIKA MEKHANIKA, 1991, (02): : 75 - 78